Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium

CN117157272BActive Publication Date: 2026-06-23RESONAC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
RESONAC CORP
Filing Date
2022-04-07
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

The thin lubricating layer of existing magnetic recording media leads to reduced wear resistance and insufficient corrosion resistance after polishing, making it difficult to meet the requirements of high recording density magnetic recording media.

Method used

A fluorinated ether compound with a specific structure is used as a lubricant to form a lubricating layer. By uniformly and tightly adhering to the protective layer, the wear resistance and corrosion inhibition effect are improved. The specific structure is represented by formula (1), with the terminal group containing 2-3 hydroxyl linkages and a perfluoropolyether chain.

Benefits of technology

This achieves a high degree of adhesion between the lubricating layer and the protective layer, improving the wear resistance and corrosion inhibition effect of the magnetic recording medium, and ensuring the reliability and durability of the medium.

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Patent Text Reader

Abstract

The fluorinated ether compound represented by the following formula. R 1 -CH2-R 2 -CH2-R 3 -CH2-R 4 -CH2-R 5 -CH2-R 6 -CH2-R 7 (R 2 R 4 R 6 They are perfluoropolyether chains with the same structure; R 3 and R 5 Each is independently a linker group containing one or more hydroxyl groups; R 1 and R 7 Each is independently represented by formula (2). )-O-CH2-CH(OH)-([D]-CH(OH)) s -[E]-CH2OH(2) (s is 0 or 1; [D] and [E] are each independently a chain structure consisting of a combination of 2 to 5 methylene groups and 1 oxygen atom, or a chain structure consisting of 1 to 4 methylene groups; wherein, when s is 0 and [E] contains an oxygen atom, the number of methylene groups contained in [E] is 3 or more).
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